JPH0624554B2 - Disposable diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a disposable diaper, and more particularly, excrement in which a stretchable elastic wire formed by a stretchable elastic member for a size adjusting function and legs is adapted to a body shape. The present invention relates to a disposable diaper having a function of preventing leakage of the hem around the legs.

[Conventional technology]

Conventionally, various disposable diapers that do not require a diaper cover have been proposed, and some of them have been put to practical use. However, at the time of use, there has been no proposal at all to make the back region and the crotch region wide (size adjustment) as necessary.

On the other hand, in the diaper, each region of the back side and the crotch region is formed to be wider than the front side region, and the elastic elastic members for the legs are arranged so that they extend outward toward the back side region and are positioned diagonally. The one attached is known.

[Problems to be solved by the invention]

Since the former does not have a size adjusting function, it is necessary for the producer to produce diapers of various sizes, and it is also necessary for consumers to purchase different diapers according to the size of the wearer's body. Generally, on the producer side, for example, for diapers for infants, the applicable sizes are sold by age, but even infants in the same age range have different body sizes,
The size may not fit your body.

On the other hand, the latter is a preferable form in terms of wearability and prevention of excrement leakage, but since the elastic elastic member is obliquely attached as described above, the production process and device of the diaper are complicated and the production efficiency is high. Low cost.

[Means for solving problems]

A main object of the present invention is to propose a disposable diaper capable of solving the above problems by a relatively simple means.

The gist of the means of the present invention for achieving the above-mentioned object is to have a front region and a back region centered on the crotch region, and an adhesive attached to the opposite side of the back region by extending to the outside. In a disposable diaper including a tape, the opposite side of each of the regions is folded back inward and the folded portion is further folded back to form a fold portion, and the fold portion cannot be spread outward in the front region. While fixing
In the crotch region and the dorsal region, the diaper is fixed at least in the dorsal region so that it can be spread outward by pulling the adhesive tape relatively strongly outward. .

In a preferred embodiment of the present invention, the fixing of the folds in the dorsal region is maintained by a release tape which is a second tape joined across the second fold line and the release The tape is provided with a cutting guide line that divides the release tape into two by pulling the adhesive tape. The elastic elastic member is provided in the crotch region in the vicinity of the outside of the flap extending from the opposite side of the core, and the elastic elastic member contracts to cause the flap to stand up to the surface side and further to stand up. The vicinity of the portion where the elastic member is located is bent outward.

〔Example〕

Further, the present invention will be described based on the illustrated embodiment,
It is as follows.

The diaper comprises a water-permeable topsheet 1, a water-impermeable backsheet 2, and an absorbent core 3 interposed between the front and backsheets.
And flaps 4 extending outward from the outer peripheral edge of the core.
5, an elastic elastic member 9 mounted in parallel with the flap 5 on the opposite side in the crotch region 6, and an adhesive tape 10 extending outward on the opposite side in the back region 8. Such a diaper is assembled by adhering the adhesive tape 10 to the front surface in the front region 7 and is known in the art.

The front and back sheets 1 and 2 are formed in a narrow width by narrowing the opposite side of the crotch region 6 in order to improve the bondability to the body, and in order to avoid the diaper from hitting the navel of the newborn baby, the outside in the front region 7 In order to prevent the excrement from leaking from the outer end of the dorsal region 8, the recessed part 11 is formed by cutting the central part along the end and the recessed part 11 is formed at the outer end of the region. A projecting portion 12 having the same shape and size as the recessed portion 11 is formed at the facing portion.
In addition, in order to improve the appearance design and wearability, the recessed part 11
The outer edges of the protruding portion 12 and the outer edges of the corners of the front region 7 and the back region 8 are formed by curves. The topsheet 1 is a porous non-woven fabric,
The back sheet 2 is made of a porous plastic film or the like, and the back sheet 2 is made of a plastic film or a laminated sheet of the nonwoven fabric and the like, and is joined by an adhesive or the like at least in a region in contact with the outer peripheral edge and the core 3.

The core 3 is formed in such a size that the outer peripheral edges of the front and back sheets 1, 2 extend from the outer peripheral edge by a predetermined length, and the core 3 has a large absorption capacity for excrement in the back side region 8 to prevent leakage thereof. , Is deviated to the region. In the illustrated example, it is formed in a rectangular shape, but in some cases, the front and rear regions 7, 8 may be formed in a so-called hourglass shape which is wider than the crotch region 6.

The flap 5 on the opposite side of the diaper is folded back inward through the first folding line 13 and is folded back outward through the second folding line 14 to form a fold portion 15 by these folding portions. is there. The folds 15 are
In the front side region 7, the overlapping portion 16 is fixed by an adhesive or a welding means, while in the back side region 8, the surface is formed so as to cross the second folding line 14 and be positioned coaxially with the adhesive tape 10. A release tape 17 for temporarily attaching the adhesive tape 10 to the sheet 1 is fixed, and the release tape is
A guide wire 18 is provided for cutting the adhesive tape 10 by pulling it relatively outward. Therefore, adhesive tape
As shown in FIG. 3, the release tape 17 is separated from the guide line 18 by pulling 10 relatively outward, and the folds 15 in the crotch region 6 and the dorsal region 8 spread outward. ,
The widths of the two regions are enlarged, and as a result, the elastic members 9 attached in parallel and opposite to each other extend outward toward the back region 8 and are positioned obliquely. Release tape 17
It is most preferable to secure the folds 15 by means of another tape, but also by means of another tape provided with the cutting guide lines 18, and without the use of these tapes, simply by means of adhesive or welding so that the topsheet 1 is not damaged. It may be temporarily fixed by means.

As can be seen from FIGS. 2 and 3, the flap 5 extending outward from the opposite side edge of the core 3 in the crotch region 6.
Is erected on the surface sheet 1 side with the opposing side edge 19 as a boundary by the contracting action of the elastic elastic member 9, and further, the portion above the erected portion where the elastic elastic member 9 is located is outward. It's bent. As a result, the diaper body has a substantially boat shape in which the crotch region 6 is deeply curved. As described above, the flap 5 has a very high flexibility as compared with the core 3, the contraction force of the elastic elastic member 9 acts relatively strong, and the flap 5 has the second shape as described above. This is because the folding elastic member 9 is folded back to the outside through the folding line 14 and the elastic elastic member 9 is positioned outside the folding line. The shape of the diaper body is such that the upper (outer) portion of the flap 5 at the position where the elastic elastic member 9 is located is pressed against the thigh without being pulled to the side of the thigh root of the wearer when the diaper is worn. Without bulging the central part between the opposing outer parts to the front side,
Form a space there. Such a worn state or the form of the diaper body is not only good in wearing sensation but also extremely effective in preventing leakage of excrement from the opposite side edge of the crotch region 6. However, in the present invention, the provision of the stretchable elastic member 9 is not an essential requirement.

In the figure, reference numeral 20 denotes a second adhesive tape, which is for allowing the first adhesive tape 10 to be reused without damaging the topsheet 1, and the non-adhesive surface is 1
It is adhered to the adhesive surface of the adhesive tape 10. By the way,
The use of such a second adhesive tape 20 is known.

〔The invention's effect〕

According to the diaper of the present invention configured as described above, when the wearer's body is small, the wearer's body can be used with the crotch region and the fold portion of the front region fixed. In the case of a large size, the adhesive tape can be pulled relatively outwardly to release the fixing of the fold portion in the front region to increase the widths of the crotch region and the back region for use. Thus, the size of the diaper can be adjusted, which is extremely convenient and economical for both producers and consumers.

[Brief description of drawings]

The drawings show one embodiment of the diaper of the present invention. Fig. 1 is a developed plan view of a partially cutaway unfinished state, Fig. 2 is a perspective view of the finished state, and Fig. 3 is an enlarged size state. FIG. 4 is a perspective view, FIG. 4 is a sectional view taken along line XX of FIG. 2, FIG. 5 is a sectional view taken along line YY of FIG. 2, and FIG. 6 is a sectional view taken along line ZZ of FIG. 1 ... Front sheet, 2 ... Back sheet 3 ... Core, 5 ... Flap 6 ... Inseam area, 7 ... Front area 8 ... Back area, 10 ... Adhesive tape 13 ... First fold Line, 14 …… Second folded line 15 …… Fold part, 17 …… Release tape 18 …… Cut guide line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-52-84041 (JP, A) JP-A-59-76903 (JP, A) JP-A-50-109044 (JP, A) JP-A-54- 34951 (JP, A) JP 62-199804 (JP, A) Actual development 59-165404 (JP, U)

Claims (4)

[Claims] 1. A disposable diaper including a front side region and a back side region centering on a crotch region and including an adhesive tape attached to the opposite side of the back side region so as to extend outward, and the disposable diaper faces the respective regions. The side is folded back inward and the folded back portion is further folded back outward to form a fold portion, and the fold portion is fixed so as not to extend outward in the front region, while the crotch region and the dorsal region are fixed. In the above diaper, the adhesive tape is fixed at least in the back region so that it can be spread outward by pulling the adhesive tape relatively strongly. 2. Fixing of the folds in the dorsal region is a second crossing across the second fold line and joined to a surface.
The diaper according to claim 1, wherein said diaper is provided with a cutting guide line which divides the second tape by a cutting guide line. 3. The diaper according to claim 2, wherein the second tape is a release tape for temporarily attaching the adhesive tape. 4. The diaper according to claim 1, wherein an absorptive core is not located on the opposite side of each of the regions where the folds are formed, and the flap is more flexible than the core.